As I have been constructing solar collectors, I stumbeled over som rather
peculiar facts which is of no interest concerning energy BUT, if you
are curious, pleese proceed:
here is some of them.
The solarconstant, which is the power that hit our planet atmosphere on
every squaremeter is = 1,354 W, and is almost equal to a small cooker disc,
or two horsepowers.
The mass of the sun equals 745 times the mass of all planets and
other flying objects in our solar system together.
The sun diameter is 1392000 km.
If you put 108 sunbowls side by side you will fill the distance between
sun and the earth.
The sun is 150 million km distant from earth.
The dubbled range is base-unit for triangular calculations far out in
the space, and called astronomical unit AU.
To make one complete triangular calculation,
you need to make two observations and take a six month coffebrake
in between.
With one AU as a triangular base, you can make a trigonometric
calculations to get our nearby star distances.
The distance given by an angle of one arcsecond is called "parsec",
and is equal to 3.26 lightyear, which is a nice short distance of
300,000 x 3,600 x 8,766 x 3.26 km,
equals 30,900,000,000,000 km (19,200,000,000,000 miles)
One arcsecond is an amazingly small unit. If you divide one revolution
into 360 sectors, and then divide "one" sector into 3600 smaller sectors,
now you got one arcsecond.
As the closest neighbour star is about four lightyears away, all measured
angles will be less than one arcsecond. (how do they manage it?)
Ones out in the space, my sense of physics is out of order, as when I think
how the moon is moving around the earth and the sun, our moon looks like a
grasshopper jumping over the earth.
In fact, the moon is declarating and accelerating itīs speed by 6860 km/hour
(4100 miles/hour) every 29 days.
Thinking of the mass of the moon, what power is needed to do that?
For comparision, the speed of the earth is 108,000 km/hour (65,000
miles/hour).
If you look for the headline "Gallileo & Io-1 or -2", you will see an
animation of the satelite "Gallileo" on its fly by the Jupiter moon "Io".
Io has active volcanos which blast up to 350 km off the surface, and they
are the hottest volcanos in the solar system.
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